BOP Stack

ABRAXAS PETROLEUM CORP RAVEN RIG NO. 1

11/03/2011

0' Total length/GL-top trip nipple

RKB= Floor= Rotary Beam to G/L=

0' to Top of Rotating Head

0" Height

TO MUD TANKS

13-5/8" 5M

BX-160 13-5/8" 5M Hydril

0' G/L to Top Hydril

0" Height

0" Height

BX-160 BX-159

13-5/8" 5M x 13-5/8" 10M DSA

13-5/8" 10M - Pipe Rams 0" Height Blind Rams

2-1/16" 10m BX-152 0" Height

13-5/8" 10M Mud cross 13-5/8" 10M

BX-159 4-1/16" 10M H.C.R. BX-159 BX-15

13-5/8" 10M - Pipe Rams 0" Height

Ground Level / Matting Board Spool set @ 3" below G/L Spool = 24"

13-5/8" 10M

Ground Level / Matting Board BX-159 13-5/8" 10M Spool BX-159 13-5/8" 10M x 11" 5M DSA RX-54 / R-54 11" 5M x 9-5/8" SOW

13-5/8" 10M

DSA = 5" Wellhead @ 32" below G/L

DSA11" 5M

C-22 Profile